Dreaming of your girlfriend means you are aware of your feelings towards her. If you see yourself as someone else’s girlfriend, it indicates that you are not ready to commit. You still want to explore. If you see yourself meeting your girlfriend’s parents, it means you are willing to take the relationship ahead. It can also indicate that you fear their disapproval.
If you see your girlfriend having sexual relations with another man, your insecurity may be projecting on the dream. You may feel that you are less of a man and cannot satisfy her.